2hp oil ratio

[heyynottony]

I have a 1990 2hp yamaha that calls for a 100 to 1 oil mix. Has anything changed like the type of Yamalube now sold or just the fact that the engine is 16 years old that would suggest that I change the ratio from 100/1 to 50/1 or somewhere in between? Thanks

[boats.net]

No the oil has went from TCW2 to TCW3 but still uses the same ratio(100:1).